Simulation and Hardware

Task 2: Simulating the ‘Astable Multivibrator’ circuit in eSim for various values of resistors and comparing its results with the output on PCB

Step 1: Simulate the schematic created in Task 1 using eSim for the first combination of R3 and R4 given in Table 1. Use the following settings for simulation:
Analysis type : Transient
Start time = 0 sec, Step = 10msec, Stop time = 12 sec

Step 2: Count the number of positive peaks across LED1 in an interval of 12 seconds and enter your observations under the column “Simulation results using eSim” in Table 1

Step 3: Count the number of positive peaks across LED2 in an interval of 12 seconds and enter your observations under the column “Simulation results using eSim” in Table 1

Step 4: Connect the resistors R3 and R4(used for simulation in Step 1) on the PCB in the required slots as shown in Figure 2.

Figure 2. Resistor connections

Step 5: Connect the 9V battery to its connector as shown in Figure 3.

Figure 3. 9V Battery connection to its connector

Step 6: Connect the other end of the 9V Battery connector to the PCB as shown in Figure 4

Figure 4. 9V Battery connection to PCB

Step 7: Verify your circuit connections as shown in Figure 5

Figure 5. Resistor connections

Step 8: Count the number of times LED1 blinks in an interval of 12 seconds and enter your observations under the column “Physical observation over PCB” in Table 1

Step 9: Count the number of times LED2 blinks in an interval of 12 seconds and enter your observations under the column “Physical observation over PCB” in Table 1

Step 10: Disconnect the 9 V battery from the PCB

Step 11: Repeat Step 1 to Step 10 for the remaining combinations of R3 and R4